First in a series of posts written for non-geeks just starting out with Linux. The idea is to provide the gist, a few important facts, and some fun suggestions. Slowly and easily. Some of the posts in this series may end up being useful references, so consider bookmarking those.

A rootkit is software that is installed on your server with the purpose of hiding the fact that your server has been compromised and providing access to your server so that the intruder can easily return. It is important to understand that in order for an intruder to install a rootkit they will have to have gained the rights to do so on your server.

Today I finally installed Ubuntu 9.10. I've only been on the upgraded system for a few hours, but everything seems to be working smoothly.

steganography is the technique used for hiding various data in different type of image and audio files with out changing the basic characteristics of file. Steghide is a utility for steganography. The color- respectivly sample-frequencies are not changed thus making the embedding resistant against first-order statistical tests.

An idea that is suggested every now and then is to look at software licensing and give it a kind of “Creative Commons” feel; that is, present the terms of the license in a pleasant and orderly way by means of icons. We’ll take the top 10 licenses and for each, label it with icons

When You use 'sudo' command it will ask for password in First time and will remember password for 15 minutes. It is a security hole for sensitive systems.You can change sudo Password Remembering Time in Ubuntu .

Starting with Ubuntu Karmic, Grub2 is used (for clean installs for now), so THIS how-to on recovering the GRUB no longer works for the new GRUB2.

But recovering GRUB2 (after breaking the GRUB2 or installing Windows - which breaks GRUB2, etc.) is just as easy. Here is what you need to do

Note: This tutorial should work for any Linux distribution which uses GRUB2, not just Ubuntu.

Would you go to a job interview in your sweatpants? Would you sent your CV with handwritten corrections? If you answer those questions with no, you might also want to write professional e-mails. The Free Software community is a tough environment when it comes to e-mail usage. This new short guide tries to help you that the community perceive you as a professional communicator.